Binder&#39;s pressboard



Manyl 22, 1923. 1,456,189

E. w. PALMER BINDERS PRESSBOARD Filed April 26 1 1921 Patented May 22, i923. i

U1\uTi=;iDl STATES PATENT ormoni.

ELBRIDGE W. PALMER, OF LONG ISLAND CITY,NEW YORK, ASSIGrNOIEt TO J'. F. TAPLEY- CO., F LONG ISLAND CITY, NEW YORK, A CORPORATION 0F NEW YORK.

BINDER S PRESSBOARD.

y Application filed April 26, 1921. Serial No. 464,723.

To all whom t may concern.' l

Beit known that I, ELBRIDGE W. PALMER,

a citizen of the United States, and resident of Long Island City, in the county of Queens 5 and State of New York, have invented a new and luseful Improvement in Binders Pressboards, of which the following is a specification. n v

The object of my invention primarily is to provide a sheet metal press-board forbookbinders use, as a substitute for the wooden press-boards, my` sheet metal press-board having numerous advantages, such for instance as greater life, no liability towarp, considerab y thinner whereby the capacity ofthe press may be enlarged, and cheapness of manufacture.

My invention more particularly comprises a built up sheet metal press-board having top and bottom sheets withk preferably an interposed reinforcingsheet, which reinforcing sheetmay be of expanded metal for strength and lightness, the sheets being surrounded by a frame, oneor b oth edges of which project beyond the plane or planes of the sheets,

said frame being provided with an internal peripheral flange inserted between the'sheets.

The parts of the entire built .up structure may be permanently united as, for instance, by spot welding, suitable spacersbeing interposed between the top andbottom sheets of the press-board. l

A practical embodiment of my invention is represented in the v accompanying drawings, in which- Fig. l represents m improved built up sheet metal press-boar in plan.

Fig. 2 represents a transverse vertical `section through the same, and

Fi 3 represents an edge View of the board.

The top sheet is denoted by 1 and the bottom sheet by 2. A reinforcing sheet 3, preferably of expanded metal, is inter osed between the top and bottom sheets. pacers 4 in the intermediate sheet are interposed at intervals between the top and bottom sheets. A peripheral frame 5 surrounds the sheets, which frame is provided with an internal peripheral flange 6 inserted between the top and botto-m sheets in the plane of the intermediate sheet. In the present instance, this flange is produced by providing a return bend in the frame 5.

ventiOn; hence, I do not wish to limit myself The edges of the peripheral frame project beyond the planes of the top and bottom sheets and the corners of the frame are .preferably rounded so as to protect the books in L connection with which the press-boards are used. v To permanently unite the several parts of the press-board, the spacers 4 may be spotweldedto the top and bottom plates. The edgescof the top and bottomplates may valso be spot-weldedv at intervals to the internal peripheral flange 6. A press-board structure substantially as herein described could be made about one-halfas thick as the, ordinary press-board and will be amply strong and stiff for the work,.thus materially increasing the capacity of the bookpress. Furthermore, the board would have no tendency to become warpedl or distorted and it could also be made very much more cheaply than the usual wooden press-boards.

It is evident that various changes may be resorted to in the form, construction and arrangement of the severalparts without departing from the spirit and scope of my into the particular embodiment'herein shown anddescribed, but 4 What I'claim is: t v l. A built up sheet metal press-board for bookbinders use comprising top and 'bottom 85 sheets, and a peripheral:frametherefor, the. edgesof which project beyond the planes of said top and bottom sheets. I y

' 2. A built up sheet metal press-board for 'l bookbinders use comprising top and bottom sheets, an intermediate reinforcing sheet, and a peripheral frame therefor, the edges of which project beyond the planes of said top and bottom sheets.

3. A built up sheet metal press-boardk for bookbinders` use comprising top and bottom sheets, an intermediate reinforcing expandxd metal sheet,and a peripheral frame thereor. i

4. A built up sheet metal press-board for bookbinders use comprising top and bottom sheets, an intermediate reinforcing expanded metal sheet, and a peripheral frame ktherefor, the edges of which project beyond the planes of said top and bottom sheets.

5. A b-uilt up sheet metalpress-board for bookbinders use comprising top and bottom sheets, an intermediate reinforcing expandsol " bookbindlers use comprisingl top and' bottom sheets, and a peripheral framel therefor lia-V- ingan internal peripheral flange inserted between said sheets'` 'the edges of which frame' project f beyondr the planes' of saidv top and t bottom sheets.

SQ built up sheet metalll pressboardl for boolrbi-nders use comprising top and bottom' sheets, a' peripheral frame therefor having an internal peripheral flange inserted 'between saiidsheets, and spacers located at different points between saidsheets.

9.- A built upV sheet metal press-board for boolrbinders use comprising top and-bottom` sheets?, a peripheral frame therefor lia-ving` a'nfinternal peripheral; fla-nge inserted. between said sheets, and spacers located at different pointsxbetween said sheets', the edges of the frame projecting beyond the planes w of saidtop andbottom sheets` l0. A built up sheet metalpressboard for' bool'ibinders use comprising top and bottom sheets; an intermediate reinforcing sheet, and aperipheral .frame therefor haring'an internal peripheral flange inserted between said topand bottom sheets in the planeA of the intermediate sheet.

11. A built up sheet metal press-boardrfor bookbinders use comprising top .and bottom sheets, an intermediate reinforcing sheet,

peripheral frametherefor haring an internallv peripheral flange inserted *betweenA saidy top and bottom sheets in theplane of the intermediateA sheet, and spacers located at different points in said intermediate sheet between the topi and botte1nslreets; i

122. A built up 'sheet metal press-board for boolrbinders use comprisng top and bottom sheets, an intermediate reinforcing sheetf a peripheral frame therefor; haring. an internal peripheral flange inserted between said top'- and bottom sheets in the plane of the intermediate sheet, and spacers located at different points in said intermediate sheet between the top and bottom sheets, the edges of theJ peripheral frame projecting; beyond the planes of the sa/id top` and bottom sheets.

13:. A; built npl sheet metalpr'ess'lboard for boolrbinders use comprising' top and bottoml edmetalv sheet, and a: peripheral'frame'there# i for having anV internal peripheral ange i112 serted between said top and bottom sheets in the plane of the intermediate sheet. f

14; i' lmiltfu'pV Asheet metal press-board for boolbinders use comprising top and botttunX sheets,, an intermediatereinforcing expanded meta-l sheet,l a peripheral frame; therefor *V- in'g an internaly peripheral Harige i-iiserteldi be=- tween said top and bottomL sheets inl the" plane of tl'ie'intermediate sheet,A and spaes located at different points inL saidE interme diate sheet between the top 'and bottom sheets. V

l5; A built up'b sheet nreta-l press-board fer' bookbind'ers use comprising top'y bottom Sheets, an intermediaterein/forcing expanded metalli' sheet7 a peripheral frametherefr hav'- ing arr internal peripheral flange inserteclbetween said topandi' bet'tom sheets" i-n the t plane of tlie interm'ediete.y sheet between the top and `bottom sheets; the edges v of 'tlef'rale. projecting beyond the plaines of" said tep and bottomrsheets.

In'testirnony that claim the'ff`oreg jing as my invention, I- have signed" my namethis 22nd dayr ofv March, 17921. f

ELBRIDGE W. yrr nrrmrt.

6 0 sheets, an intermediatey reinforcing expand-y 

